PLATE LXX. 
Page. 
ILLUSTRATIONS OF THE NATURE OF THE RAMENTACEOUS INVESTITURE_OF THE 
GENUS: C YOADED Day. soccer icra ocean ienaeide ete wine ae 392 
Fig. 1. Epidermal cells of a petiole giving origin to the ramentaceous 
chaff. 
Fig. 2. Ramentum as seen between two leaf bases within the armor. 
Fig. 3. Dhustration of the relative great length of the chaffy hairs, which 
might be traced much farther. The oneon the left is cut obliquely, show- 
ing the parallel cells. 
Figs. 4, 5. Cross sections of the chaff, showing their flat, sharp-edged, 
multicellular character. 
Norr.—Figs. 1-3 were obtained from slides of No. 500.76 of the Museum of the 
University of Wyoming, and therefore belong to C. Knowltoniana. Figs. 4 and 5 are 
from No. 500.39, and therefore belong to C. ramentosa. 
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